Boiler.



. SPRENGER.

BOILER.

APPLICATION FILEDMAR. l1, 1914.

caLUMBm PLANouR/PH co,. WAsHlNuToN, n. c,

1N l H I 1111ll11 i Y 11@ 111 11' H. A. SPRENGER.

BOILER.

APPucATloN FILED 1111111.11, 1914.

1,164,884. I Patented Dec. 21, 1915.

3 SHEETS-SHEET 2.

1 l 1 1 0&1.. 1 1

Pafemed 11110.21, 1915.

3 SHEETS-SHEET 3.

H. A. SPRENGER.

BOILER.

APPLICATION F1LED 1111111.11. 1914.

coLUMBlA PLANOCRAPH C0..WASH|NOTON. D. c.

` OFFICE fjHiiiitYl. "sPRENenIaj or'DETItoIT, MICHIGAN; A's'sreivon To JosEPHs'IRENGERAND @Zliwhvom i may-concern.' j y.

A. SPRENGER,

Be itgk'no'wn that I, HENRI,

y ra citizen'of the United'nStatesfof'America,

:andVV State of: Michigan, have invented .cer-

tain` new and vuseful Improvements in Boilaccompanying drawings..

e iff-.Inv the construction ofsteam boilers and especially those for marine use inwhich the 2 lgs-pace .is necessarily restricted', itis desirable .that theV parts IbeY soy fdisposed as to be readily accessible for cleaning and that the l5 boiler 4be suiiiciently rigid to withstand the oscillationsto whichit is subjected.

This invention relates to boilers and to jan-arrangement thereof whereby' they are .readily accessiblel for cleaning, presentlarge ,-radmtingsurfaces in and around the comfustionchamber' and Aare extremely `rigid withoutbeing complicated. z

- v'lhe invention consists 1n theniatters here- `in ahfteif set forth .and more particularly pointed outy in the appended claims. l

Infthe drawings, Figure. l is a View in 'Y .-transversesection ofV a form ofboiler that embodies.. features of the invention; vFig. 2

i Pis a v View7 longitudinal section taken. on .or-about l1ne.II.-*II of Figi; Fig. 3 1s a vrview 'inzfront elevation,v partially broken away-of the boiler; Fig. 4 is a View in secjtion taken-on or about A line IV-IV. ofFig. .3, -jjiarts` beingfbroken away; Fig. 5. Vis:v a

.yiewinhtransverse section ,of a Vmodified si l,

forni ofthe-inventionzy and Fig. 6 is af view taken on'or vabout line VIV-VI of Fig'. 5. l

. x-Referring? textile-drawings, a front water leg land rear water legA 2 ar'efconnected by l4121 a seriesof watery tubes 3y disposed on'either side of the structure and ,upperlwater tubes 4. A pair of steam-drums 5l also connect 'the upper portion `ofythe legs. A grate space below fire doors 6Min the front waterlegs is'spannedbysuitablebars 7 andis cut off from the rear Vconnections'of the boiler by a transverse bridge wall 8. A

Y flue shell 9 is secured in a suitable opening in the rear wall 10 of the front water leg and extends rearwardly therefrom over the grate space. The head 1l that closes the back end of the drum is at an intervalvfrom the rear water leg 2 and is Vin direct communication therewith through .a mud drum Y 12 connected by a fitting 13 with the boty 'jfs'onsg'ngcoinrtmivnnsrirr DOING sUsINnss 'INnnTIto'IryfI/IIcHIcAN. l-

l BOILER.

' `Specification of Letters Patent. *"Pafent'ede 21, 1915 'Abplic'aiioiid March 11,1914. servia1.Nb .s2c,-e3if ,if 'i l opening of the 'forward wall 14 of the rear water .legLfThe flueshelland mud drum `lrest upon a .suitable cradlev 16 that isfsupfl ported-as .by Inasonry or across Abearnflr' I back v1of` the vllldgewvall l8.

. Fl'ue: tubes l'19. extend through theshell-'Q andare secured in the usualmanner inthe front wall 2O ofthe front water leg'thereby discharging into the smokey breeching 21 that is mountedon the front` water` leg.. A

.steam pipe22fconnects the upperportions VVof the water legs between the drums 5 Wfith a suitablefdeliverypipe 23.1eading therefrom. A hand hole plate24 .in the` rear j.

wall 25 of the rear water] leg y2 permits ''.ready accessV to the drum 12. Suitable stay vmembers (Figg) of anypreferred constructionni'ay `connect the drums 5 with the flue shell 9 tol steady` .the latter.. A.y jacket A27 forms the .side walls of the furnace.

lreferablyA the latter consistsfof a suitable lire. proof lining'28 such as'asbestosor, the like, with Nan outermetal sheathing of any on the 'water tubes"4. Suitablehandhole plat-es, one of vwhichfis indicated ydiagram- .matically at 30,v are placed inthe rearwater legl and froiit water leg opposite each of the water tubes 3 and 4 and other hand holeland man-hole'plates areprovided wherever l Vitis desired. The water legs `are further lstiifened4 by stay bolts, not shown. Wherever Vneeded,Y the usual 'accessories'of boiler construction vare added. l n

Inthe modifications'shown 1n Figs. 5 and f tom the drum andzsecuredlina suitablel i 6, aseiies of water ytubes 31 aredisposed to connect the front-and Yrear water legsthe upper ltubesjbeifng substantially on the same plane with a series oiauxiliary water tubes 32 thatAarej'dispose(l between the forward -wallg-of the rear wat fr leg and the head'y33 of the iiue shell.

leseich modification, a jacket 34 that is adjacent the 'water tubes is supported by suitable means so as to abut against the flue shell and to bridge the space over the auxiliary. water tube 32 between the rear end of the flue shell and the rear water leg as indicated in Fig. 6.

As a result of this construction a boiler isJ obtained that presents a very .large surface i,'for-absorptionbt heat oi thelgases off thereof, atransyerseibridgewall'between the coinbustion,A the latter, 'passing- K upwardly flower portions of the j waterglegs vforrniliga y 55 lagain's'tthe f 'tubesimdaroundjtheishell gratespaCebakbffthe *frontwat'eflega Y the shell into the breechingij LBecause of of V"thegrear-water leg towafdthe bridge wall,jV

position of the steam pipebetween the uppenf., faicradle supporting the outer end portion of i Y shellsV org" drumsfggthe. boiler can bey tilted-Q.l tliehmnd. drum,` aiueV shel-lextendingfrom 'laterallytlroigh'a Ve ide are withoutY in an opening'in the.' rear. wall :ofthefffront anyway 'enoroachi'ng uponftheisteam space/f water leg o'w'ferthebridge Vwallzand-ab'ove the Y Y so that thej deliveryis alwaysy uniform re- The boiler' is" particularly eilicientgbecause of its.' large radiatingsfurface vand its compact structure which permitsit to be readily cleansed, the dispositionofvparts being suchf. that they are readily access"ible` at all times.

Y The boiler i's extremely rigid and doesfnot tend' to startyits seamsor strain.f the joints .-whenroscillated, as there are'no great bodies 'of water'whosejnertia must be resisted.` I

Obviously, changes inthe details offcony i i struction `may 'be made Vwithout departing 'from the spiritof the inventionv andf-I do not care 'to limit myself'to. any'fparticular Vfrm or arrangement ofparts. Y i' boiler comprising'a front water leg, a/rear water leg', 'seri-es of watertubesconneeting ythe legs V`nea.i'-"the sides" thereof;k a pair of drumsl connecting the upper portions of lthe legs, iV-transverselydisposed cupi-e5- uf this patenting beeistined' f bridge wall between thefl'owerfend portions o 'f the water legs forminga` grate space adjacent thefront'-v water leg',oradle back of thebridge wall,` 'a mud drum extending for- {ward from the vrear waterQleg and. resting; on

the cradle,j a "fluei shell Vlextending'` inwardly lffromthe 'rear wall ojtlieffront water leg fand having vrcom'I'nunication"withV the mud f '40" drum on which i'tifis supported;fines` in the shell "extending, through lthe l' front" wall of fthe front waterleg; a'smoke breeching on they front water' leg'fin communication Vwith vthe lues, a steam pipe in communication with the watergllegs aboveithe:normal level l ofthe contents v4of the steam drums'l and4 a.

jacket extendingfbetween the wat'er'legs and inclosing the water tubesand lu'e'shelli .2. A boiler comprising a frontwater'leg;

a rear water leg,l stea1`n' drums-connecting the j upper *portions of the w-aterlegs,afseries of' "Wat'erjtubes connecting the 'water legs along the .margins and "acrosstlie upper portions at' an .interval fromfthe'afdj acentf walloffthe rear water'leg, y A l A\ boiler' comprising, an'v upright 'front water .leg provided w'itln'* 4fire doors v*near 'zits base,A an uprightrear water leg, apair'of oommunieatin; a transverse: bridge wall: be-

grate bars 'spanning' the-space,v afcradlebetween 4 the bridge wall;- v and'. the rearl Water leg, va mud drum@extendingfforwardly steam drumsv eonnectingf the upper-"portio'ns';l of the water legs, watertubes disposed valong V'themargins: and across the upper portionsV "of the waterlegs f with which they? areff'fin l tween the lower portions. of the water-legs l forming .'a'grate space `back vofl the fire,"doors,v

the front 2wallfof Athe rear. water i legiSandil v'resting on the cradle; a flue shellwliose front Lend.l portion vis secured in an opening; in 'the rear wall ofthe fronti-water leg and whose rearheadv`at an interval from: 'thefrear- #water-(leg, the flue shell'beingin communi-"- cation with :the lmud ndrum on which Y it -i's f "supported,v flue' tubes Aextending from. the

rear head-of the shell through the frontlwall [ofthe frontwaten leg,` a smoke breechin'g o'n the front water 'leg A:in communicatinawithl the Hue. tubes and. mf-insulating? j aoket' .inclosin'g'the'water tubes;v` V 'l In testimony' whereof in presence ofztwo witnesses.` j HENRYSA-`S "Witnesses'i O'rToxFfBaRTnEL', l C. RQ STIOKNEI..

or ive eents cach, by` addressing the Commissioner:'ol'atntg l v I Washington, D. 0;l f' r vI. f 

